Chemineer(TM) Top-Entering Agitators Installed at Severn Trent Water's WWTW in Birmingham, UK

Dayton, Ohio — Chemineer agitators are playing a key role in six newly upgraded Activated Sludge Process (ASP) lanes at Severn Trent Water’s WWTW in Birmingham.

Installed in six phases with no disruption to operations, the 24 Chemineer Model 20 GT agitators are successfully homogenizing fluid streams prior to aeration, as well as ensuring that there is no return flow from the aeration lanes back into the anoxic zones.

Operating 24/7, each Chemineer agitator utilizes a high efficiency HE-3 impeller, rotating at a low rpm. Prior to installation, Chemineer provided Severn Trent Water with its in-house CFD to demonstrate the comprehensive mixing benefits of its impeller design.

Andy Mellor, Site Manager for Costain at Birmingham, commented: "The new Chemineer agitators are proving to be a very reliable and efficient part of our newly enhanced ASP lanes, which now have sufficient space for pre-aerated zones in the process, with liquid depths raised by 300mm."

Irfan Rehman, Sales Manager at Chemineer, added: "The performance, reliability and longevity of our agitators are becoming increasingly attractive to the industry, with Chemineer able to offer guarantees on all espects of our equipment, from the gearbox to the seal, the motor and the impeller."

Chemineer’s Model 20 GT agitators can also be fitted with the RL-3 ragless impeller for this type of installation. The high-efficiency gearbox of the Model 20 and the unique characteristics of the RL-3 impeller work together to eliminate downtime and maintenance costs, increase performance and extend the service life of the agitator.

NOV Mono is a division of National Oilwell Varco. It comprises a group of specialist companies offering progressing cavity pumps, artificial lift systems, industrial mixers, grinders, screens and aftermarket spares and services, across a broad spectrum of industrial sectors including water and wastewater, oil and gas, chemical, pulp and paper, food and beverage and agriculture. The company first began manufacturing progressing cavity pumps in 1935 and industrial mixers in 1952, so it has a heritage of over 75 years that is built on world-renowned design, expertise and excellence. The division has over 1,600 employees and a genuinely global reach. NOV Mono has facilities around the world including Australia, New Zealand, USA, China, South Africa, France and UK, which are supported by a large network of international distributor partners.

National Oilwell Varco (NOV)

With its headquarters in Houston, TX USA, National Oilwell Varco has over 170 years’ experience as a leader in the design, manufacture and sale of equipment and components used in oil and gas drilling and production operations, the provision of oilfield services, and supply chain integration services to the oil and gas industry. It has more than 100 subsidiaries and over 60,000 employees at over 1,000 sites around the world, plus annual revenues in excess of $20 billion.

Reader service inquiries should be forwarded to Adrienne Kreighbaum, Chemineer™, 5870 Poe Avenue, Dayton, Ohio 45414. Telephone: 937-454-3200. E-mail: Web: For the nearest sales office, call 1-800-643-0641, or visit the Chemineer website.

Company Address:


5870 Poe Avenue

Dayton, Ohio 45414

Telephone: (937) 454-3200


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